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Finding the Fourth Proportional to 712.62, 1,067.96 and 346.72

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Solution

The fourth proportional to 712.62, 1,067.96 and 346.72 is: 519.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.62 : 1,067.96 = 346.72 : x
  2. Step 2: Convert to fraction form
    712.62/1,067.96 = 346.72/x
  3. Step 3: Cross multiply
    712.62x = 1,067.96 × 346.72
  4. Step 4: Simplify right side
    712.62x = 370,281.36
  5. Step 5: Solve for x
    x = 370,281.36/712.62
  6. Step 6: Final answer
    x = 519.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.